Malicious PDF — malware analysis report

Static analysis result for SHA-256 717bd684ca8115dd…

MALICIOUS

PDF

49.5 KB Created: 2020-07-24 07:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acbf322bd9a90880503391bfbc7cb816 SHA-1: b05f70bbf26f427488287ec41616baf227b4231b SHA-256: 717bd684ca8115ddee65aa1da8eb04a27210c44f614ecc6d69908e6fa4044c24
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a PDF redirector link to 'ttraff.ru' and a PDF SEO link farm. The document body, though heavily obfuscated, suggests a lure related to a 'research plan template'. The presence of many external PDF links, including one hosted on Shopify, indicates a potential attempt to manipulate search engine results or distribute additional malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=research%20plan%20template%20pdf
    • http://files.diypaintguy.com/uploads/1/3/1/0/131071315/362fd.pdf
    • http://files.loandbeholdphoto.com/uploads/1/3/2/6/132695388/lezalilomiwig.pdf
    • http://files.teachingreexplored.org/uploads/1/3/1/1/131164124/xevasemutitixesobuxi.pdf
    • http://files.christopherdavidroche.com/uploads/1/3/1/6/131606128/gusidune.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/tebevekab.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/pawofaganuzepem.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/94400665235.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/wugapinitokuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/85210259627.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/14489066766.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/32075853538.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/monusinemuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/79168610165.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dijupabexapuvasazanuripik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008646.bin
5081e72c4d9165ce804284f72540afa6130cf623d4152e4a2175f267797ef1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 5032 bytes
font_01_sfnt_off0000972b.bin
5bc8a97e4d38749d3c2e138d9e0e0410a45133d7c8ea7324353222b1af09f0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972B 9960 bytes

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